Knife and scissors sharpener.



G. s. MILLER. KNIFE AND SGISSORS SHARPBNER.

APPLICATION FILED JAN. 31. 1910.

1,018,579. Patented Feb. 27, 1912.

COLUMBIA PLANOORAPH C0 WASHINGTON n c cnonen s. MILLER, or on'ronco,ILLINOIS.

KNIFE AND SCISSGRS SHAB-PENER.

Specification of Letters Patent.

Patented Feb. 27, 1912.

Application filed January 31, 1910. Serial No. 541,175.

To all whom it may concern:

' Be it known that I, Gnonon S. MILLER, a citizen of the United States,and a resident of the city of Chicago, in the county of Cook and Stateof Illinois, have invented certain new and useful Improvements in Knifeand Scissors Sharpeners; and I do hereby declare that the following is afull, clear, and exact description of. the same, reference being had tothe accompanying drawings, and to the numbers of reference markedthereon, which form a part of this specification.

This invention relates to improvements in knife and scissors sharpenersof that class where a revolving or abrasive disk or wheel is employed toattain the result.

The object of this invention is to afford a sharpener by the use ofwhich one with out previous skill can attain as good results as afterlong practice, and also to afford a construction adapted to definitelyposition the knife to insure the angle of operation for the abrasivecutter or grinder so that perfection of result is mechanically secured.

In the same manner it is an object of the invention to afford aconstruction in which the scissors blade is always presented to thegrinder at exactly the angle necessary to insure the best results insharpening Finally it is an object of the invention to afford aconstruction permitting considerable latitude or play in the operatingarm, thus permitting the grinding element to follow the contour of theknife edge, at all times maintaining its proper angle of operation.

The invention consists in the matters hereinafter described and morefully pointed out and defined in the appended. claims.

In the drawings: Figure 1 is a side elevation of a device embodying myinvention. Fig. 2 is an enlarged top plan view thereof, showing the sameadjusted for knife sharpening. Fig. 3 is a section on line 33 of Fig. 2.Fig. I is a front elevation showing the device adjusted for scissorsharpening. Fig. 5 is an enlarged longitudinal section of the bracketand grinder arm. Fig. 6 is a section on line 6-6 of Fig. 2. Fig. 7 is afragmentary view of a modified construction.

As shown in the drawings: 1, indicates a bracket provided with a clamp2, for engaging the same to a table top or any suitable support. Saidbracket extends substantially horizontally outward and is provided atits outer end with a horizontal transverse head 3, the upper face ofwhich is planed or otherwise dressed off to afford an upward and outwardinclination, as shown in Fig. 1, such angle of inclination being theangle determined upon as the most elfective angle for knife sharpeningof the class to which the machine is to be applied. Secured on said armby means of a bolt 4, and thumb 2 1, is a spring clamping plate 5,having a shank 6, through which said set screw engages said clampingplate, being extended longitudinally the head and acting to rigidly gripthe knife X, thereon, as shown in Figs. 2 and 5, when in use. The outeror front face of said head 3, is planed or dressed off to afford a planesurface and is beveled upwardly and inwardly, as shown in Figs. 1 and 5,to re ceive the flat side of the scissors blade thereagainst and securedon said head is a complemental clamping jaw 6, shaped to engage theouter side of the scissors blade and firmly clamp the same in place. Forthis purpose, a bolt and thumb nut 7 and 8, are employed, said boltextending through said head 3, and clamping jaw 6, as shown in Fig. 5,and permitting any desired degree of pressure upon the scissors blade tobe attained.

Extending above the table and rearwardly from the clamp 2, is an arm 9,provided with a central vertical bore extending therethrough. Engagedtherein is a pivot pin 10, provided with an integral. head 11, boredtransversely to provide an eye, as shown in Figs. 2 and 3. Extendingthrough said bore in said head is a pivot pin 12, the head 13, of whichis likewise transversely bored to receive the cylindric end 1 1-, of thearm 15, thereon, and as shown, a nut 16, is threaded on the reduced endof said arm to hold the same at all times in operative relation. Saidlever arm 15, extends forwardly over the grinding head and is providedat its forward end with an aperture therethrough adapted to receive thepin 17, on which is secured the circular grinding stone 18, ofcarborundum or any desired abrasive and, as shown, a handle 19, isthreaded on said screw or bolt to firmly engage the stone thereto andalso serves for manual engagement to manipulate said stone insharpening.

The operation is as follows: Having secured the knife in place, as, forinstance, by means of the bolt and nut 4 and 24, which binds the springclamping jaw 5, down wardly thereon, the arm 15, is lifted by means ofthe handle 19, and resting upon the blade of the knife (the edge ofwhich is directed outwardly) said stone is swung back and forth frompoint to heel until one side thereof has been brought down sufficientlywhereupon the knife is reversed to bring the other side of the bladeuppermost and the operation is repeated until the de sired edge isattained. In the same manner the scissors blade is engaged against thehead by means of the clamping jaw 6 therefor and the grinder swung backand forth over the edge thereof always presenting the same angle to thework, and owing to the rotation of the stone on the arm, insuring theuniform dressing of the stone while grinding. In either event, as thegrinder approaches an inclined face, as, for instance, the point of theknife or the point of the scissors blade, the universal joint affordedby the connection between the arm 15, and bracket 9, permits said stoneto rock downwardly sufficiently to follow the edge, thus grinding eitherthe knife or the scissors or any cutting implement uniformly for theentire length of the blade.

In the construction shown in Fig. 7, two grinding elements 18 and 20, ora grinding and a finishing element, are secured on opposite'sides thearm 15, by means of any suitable connection, as, for instance, a bolt21, is embedded in the element 18, and is threaded to engage in athreaded socket in element 20, thus engaging both elements to the arm onopposite sides thereof. A'handle 22, is secured to the end of the arm.This permits either grinder or cutter to be used as the arm may berotated in the head 13, to bring either into action.

Of course, I am aware that various modi fications in the constructionmay be effected without departing from the principles of this invention,and I therefore do not purpose limiting myself otherwise thannecessitated by the prior art.

I claim as my invention:

1. The combination with a suitable supporting bracket, of an inclinedclamping jaw thereon, an adjustable clamping jaw adapted to engage aknife thereon, an arm pivoted on said bracket by means affording auniversal joint to swing over the blade of the knife, a grinding disk onsaid arm adapted to operate on said blade for its entire length, and ahandle engaged on said grinding disk and affording means for manuallyoperating and rotating the same while engaged on the knife.

2. The combination with a suitable supporting bracket, of an inclinedclamping jaw thereon, an adjustable spring clamping jaw adapted toengage" an edge tool thereon, an arm pivoted on said bracket to swingover the blade of said tool, a grinding disk on said arm adapted tooperate on said blade for its entire length, a universal joint affordinga part of the connect-ion between said arm and said bracket to permitthe surface of said disk following the edge of the tool, and a handleengaged on said grinding disk aifording means for manually operating androtating the same while engaged on the knife.

3. The combination with a suitable bracket, of a knife supporting faceand clamping jaw thereon, a flat inclined face thereon adapted to beengaged by a scissors blade, an adjustable clamping jaw complementaltherewith to engage the scissors blade thereto, an arm engaged to rotateand to swing on the bracket and adapted to be swung over the blade ofthe scissors, and a rotatable grinding element carried on the end of thearm for engagement with the scissors.

4c. The combination with a suitable bracket, of a knife support-ingface, a clamp ing jaw for securing a knife on said face, a flat inclinedface adapted to receive a scissors blade thereon, an adjustable clampingjaw for securing the scissors blade there to, an arm engaged on'thebracket to rotate and to swing horizontally and also vertically, arotatable grinding stone carried on the end of the arm for engagementwith the knife or the scissors, and a handle affording means for movingsaid arm and stone and rotating the stone while in operation.

5. A device of the class described, embracing a bracket, a head thereonprovided with an inclined face to receive a knife, a clamping jawadapted to clamp the knife thereto in position for sharpening, said headprovided with an inclined face to receive a blade of a scissorsthereagainst, a clamping jaw adapted to clamp the scissors blade to thehead for sharpening, an arm engaged on said bracket to rotate and toswing in either of two planes, a grinding stone on the end of said armadapted to operate on the blades to be sharpened when swung along theedge thereof, and a handle for operating the stone.

6. A device of the class described, embodying a bracket, a head thereonprovided with two inclined faces, one for receiving a knife blade andthe other for receiving a scissors blade, clamping jaws for the same,and a grinding element adapted to operate on either of said blades.

In testimony whereof I have hereunto subscribed my name in the presenceof two subscribing witnesses.

GEORGE S. MILLER.

Witnesses C. IV. Hnms, K. E. HANNAH.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

